Miniaturized relay



Sept. 13, 1966 v. c. HUCKABEE 3, 7 87 MINIATURIZED RELAY Filed April 22, 1963 2 Sheets-$heet l M UTA/0E4 62mm; His/(4e INVENTOR.

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Spas/ 1517014 United States Patent 3,273,087 MINIATURIZED RELAY Vandel Curtis Huckabee, Portland, Oreg., assignor to Electronic Specialty Co., Los Angeles, Calif., a corporation of California Filed Apr. 22, 1963, Ser. No. 274,671 8 Claims. (Cl. 335-128) This invention relates to relays and more particularly to an improved miniaturized electromechanical relay.

With the advent of high speed aircraft, missiles and space vehicles, all requiring complex electronic systems, it has become necessary to greatly reduce the size of individual components from both a size and weight standpoint. This is in order to permit them to be carried within the limitations of space and weight requirements of the carrying vehicle. To merely make smaller each of the individual par-ts of a given component by a scaling factor is not always possible or desirable.

It is therefore a primary object of the present invention to provide a highly reliable miniaturized relay of improved design.

Another object of the present invention is to provide an improved electromagnetic relay capable of switching over a wide range of input currents.

A further object of the present invention is the provision of a miniaturized relay that is simple yet reliable in operation, light weight yet rugged and durable in construction, and compact yet convenient and easy to fabricate.

Other objects'will become apparent as the description of the drawings proceeds, wherein:

In the drawings:

FIGURE 1 is a perspective view of the presently preferred embodiment of a relay constructed in accordance with the present invention;

FIGURE 2 is a bottom View, somewhat enlarged, of the relay of FIGURE 1;

FIGURE 3 is a side elevation, partly in section, greatly enlarged of the relay of FIGURE 1;

. FIGURE 4 is a view taken along line 44 of FIG- URE 3;

FIGURE 5 is a view taken along line 55 of FIG- URE 3;

FIGURE 6 is a view taken along line 66 of FIG- URE 3;

FIGURE 7 is a view taken along line 77 of FIG- URE 6;

FIGURE 8 is a view taken along line 8-8 of FIG- URE 6;

FIGURE 9 is an exploded assembly view in perspective of the relay of FIGURE 1;

FIGURE 10 is a side elevation, partly in section of an alternate embodiment of the present invention relay; and

FIGURE 11 is a perspective view of the contact portion of the relay of FIGURE 10.

Referring now to FIGURE 1 which shows the switch ready for use, there is shown a switch housing or can 10 with contact pins 12, 14, 16, 18, 20, 22, 24 and 26 extending therefrom, pins 22, 24 and 26 not being visible in the figure. This can, consisting of a shell having a top and sides, is preferably formed from nickel silver approximately 0.1 inch thick. The outer diameters of the can are on the order of .79 inch long, .385 inch wide and .40 inch high. This can be adapted to be inserted over the coil assembly, armature assembly and header and contact assembly as will be hereinafter described. This housing is of about the same width and length as conventional microminiature relays now in use that are popularly known as crystal can relays which derives its name from its size comparable to the normal size of the can in which ice radio crystals are shipped. The height of the can in the present invention, however, is about half the height of the microminiature relay. Since it is approximately onehalf the size of a microminiature relay, it is properly entitled by the inventor as a Pico Relay or a half-size crystal can relay.

The pins protruding from beneath the can are laid out on a 0.2 inch grid system which is standard for printed circuit board design and therefore the present switch, although small, is readily adaptable and interchangeable with other switches in the printed circuit art. These pins are insertable in convenient openings in printed circuit boards. Circuit boards normally are spaced or stacked one inch apart in housing racks because of the almost one inch height of previously used crystal can relay switches. However, with the present micromicrominature or Pico switch of approximately .40 inch in height, the circuit boards may now be spaced one-half inch apart, resulting in a total saving of half the space heretofore required in the stacking of circuit boards in their racks.

A bottom view of the relay switch is shown in FIG- URE 2 wherein the uniform symmetrical spacing of the contact pins 12, 114, :16, 18, 20, 22, 24 and 26 is apparent. These pins extend through a base or header plate 28 to which they are mounted in spaced insulating relationship by means of hermetically sealed glass ring spacers -30, 32, 34, 36, 38, 40, 42 and 44. One pin 18 is retained in glass insulation '36 of a color different than the other pins to indicate the pin to be connected to a positive DC. bias for coil energization when a diode is used. If a diode is to be inserted in series or in parallel with the coil, all to be hereinafter explained, the diagonally opposed inner pin 26 on the opposite row of pins, as indicated by the arrow on the plate, identifies the pin which is connected to the other end of the coil winding. Without the diode, because of symmetry, the switch may be turned around such that pin 20 may be inserted into circuit board opening formerly occupied by pin 12. Pins 16 and 24 are connected to the two blades of a double-throw switch, the preferred embodiment illustrative of the present invention. The blade connected to pin 24 switches contact between pins 12 and .14 while the blade connected to pin 16 switches between pins 20 and 22. Legs 46, 48, and 52 extend down from a coil assembly frame within the can and are welded to the header plate 28.

Reference is now made to FIGURE 3 wherein is shown a side elevation with the housing in section. Here the upper row of pins in FIGURE 2, pins 14, 16, 18 and 20 are shown extending through the header plate 28. Pins 12, 26, 24 and 22 are directly behind and therefore cannot be shown. The upper portions of pins 12 and 22 extend higher than pins 14 and 20 and therefore the top portions can be seen. These pins respectively have upper blade contacts 54, 56 mounted thereon which engage blades 58, 60 respectively when they are in their uppermost position. Lower blade contacts 62, 64 extend from pins 14, 20 respectively and engage blades 58 and 60 when they are in their lowermost position. Blades 58 and 60 are of Phosphor-bronze spring temper materials for currents up to about one-ampere, silver, nickel or magnesium being preferred for higher current carrying capabilities. The blades 58 and 60 are connected at their ends to pins 18 and 16 respectively through blade brackets 66, 68. These blades are so positioned by adjustment with tabs 70, 72 on brackets 66, 68 as to engage upper blade contacts 54, 56 except when in a depressed condition. A coil assembly frame 74, mounted by legs 46, 48, 50 and 52, extends over the blades 58, 60 to support the coils 76, 78, of which coil 76 is shown. Between the legs are downwardly extending sides 80, 82 from which armature 84 is pivotally mounted through pivot pin 86. The frame 74 has upturned ends 88, 90 between which the coils are positioned. A U-shaped core 92 extends through ends 88, 90 and coils 76, 78. The ends 94, 96 of the U-shaped core 92, after extending through the coils, terminate in flattened end portions of which portion 94 is shown. Armature 84 is normally urged clockwise about pivot pin 86 by spring 102 so as to permit blade 58 to contact upper blade contact 54 and blade 60 to be urged downwardly into contact with lower blade contact 64, as shown in the drawing. Coil 76 is connected to pin 18 through jumper 98. A similar jumper 100 connects the other end of the coil to pin 26 which is positioned behind pin 16. Extending from end 90 of frame 74 is a projection 101 beneath which is positioned a four-turn closed ended spring 102 which engages crossbar 103 of armature 84. A recessed portion 104 on the crossbar maintains the spring in position. A vent hole 105 is provided for a purpose to be hereinafter described. Can 10 fits snugly over header plate 28 and is soldered thereto to effect a hermetic seal.

FIGURE 4 shows an end 'view of the coil assembly, armature assembly, header and contact assembly, with the can housing shown in section. Connecting pins 20 and 22 extend downwardly from header plate 28. Pin 22 extends upwardly therethrough a distance greater than the pin 20 to accommodate upper blade contact 56. Lower blade contact 64 is shown extending from contact pin 20. Blade 60 is positioned between the contacts 56 and 64. In the unenergized condition of the switch, armature 84 is positioned downwardly. A glass insulated actuator 108, extending downwardly from armature 84 holds blade 60 against lower blade contact 64. The body portion 110 of armature 84 pivots on pin 86 and, when core ends 94, 96 have been magnetized, armature crossbar 103 is upwardly thereagainst. Ends 94 and 96 have flat undersurfaces to provide for good contact with crossbar 103. Otherwise the magnetization strength of the ends will not be great enough to retain the armature in position. Flattening of the ends also prevents Withdrawal of the core from its position through ends 88 and 90, Spring 102 extending downwardly from projection 101 is particularly useful on the heavier current model as it provides for a fast snap and break away upon energization and de-energization of the coils, to avoid arcing and to avoid contact bouncing upon actuation. The spring also assists in holding the armature in position when the switch is subjected to a vibrational environment. In this manner, the coil and spring work together for positive positioning of switch blade 60. In FIGURE 4, pins 20 and 22 block pins 18 and 24 from view. However, the end 'view of the blade brackets 66 and 68 connected thereto can be seen. Insulation 112, consisting of a layer of Teflon dielectric material separates the lower blade contacts 62, 64, blades 58, 60 and blade brackets 66, 68 from the header plate 28.

One outstanding feature of the present invention resides in the contact pin construction and assembly of the pins to the header plate, a fragmentary view of which is taken along the line 55 of FIGURE 3 and shown in FIG- URE 5. Here pin 12 is bonded to header plate 28 through a glass insulation ring spacer 30 which is an excellent hermetic-sealing dielectric material which will not permit arcing between pin 12 and plate 28. This pin consists of a copper center core 114 surrounded by a steel cylindrical jacket 116 over which is plated a layer of nickel 118. Jacket 116 provides strength and mechanical resistance against accidental bending during plug-in of the switch into the circuit board. Core 114 is a good current conductor and the nickel 118 serves as a foundation for the gold flashing 120 which is applied after the pin [has been mounted. Nickel is also very compatible with glass for a glass-to-metal seal, While this pin is of the plug-in type, it should be understood that the lower end could be curved or looped to provide a solder hook end which is preferable when permanent installation is desired.

4 Reference is now made to FIGURE 6 which is a plan view taken along line 66 of FIGURE 3 and showing in plan view the header and contact assembly and the blade assembly. The legs 46, 48, 50, 52 of coil assembly frame 74 and can 10 are shown in section. An insulating material, such as a Teflon sheet for example, which is a good dielectric and has excellent insulating qualities, is shown positioned over header plate 28 at all points where portions of the contact or blade assembly might make contact or cause an arc with the header plate 28. Upper contact 56 is shown welded to pin 22 and lower blade contact 64 is shown welded to pin 20. Similarly, upper blade contact 54 is welded to the upper part of pin 12 and lower blade contact 62 is shown welded to the upper part of pin 14. Jumpers 98 and 100 are welded to pins 18 and 26 respectively, and serve to connect these pins to the coil leads in a manner shown in FIGURE 3 after the coils have been positioned on the coil assembly frame 74. It is noted that when the coils are positioned on the frame over the contact assembly and armature assembly, welding of the coil leads to these pins would be quite diflicult if not impossible; hence, the jumper connections. Positioned over the insulation 112 and over pins 16 and 24 are the blade brackets 66, 68. These brackets have flat base portions to which the end of blades 58 and 60 may be welded and upturned portions to which the pins 16, 24 can make an excellent weld contact. Blades 58 and 60 are positioned between the upper and lower blade contacts as shown and may be adjusted vertically between the contacts by proper adjustment of tabs and 72 of the blade brackets. Normally, these blades will engage the under surfaces of the upper blade contacts 54, 56.

An enlargement of the upper and lower blade contacts and blade is shown in FIGURE 8 which is taken along line 8-8 of FIGURE 6. The flattened disc-like ends 122, 124 with edges curved away from blade 60 provide for a relatively larger surface contact to insure longer life with the heavier current operation. These contacts are of fine silver with a gold flashing to reduce the contact resistance.

FIGURE 7 is a side elevation view similar to FIGURE 3, but taken in section along the line 77 of FIGURE 6, in order to better show the relationship of the parts during switch operation. Coil 78 is positioned on the coil assembly frame 74 between ends 88, and retained therein by core 92. End 90 has a bracket projection 101 from which extends spring 102. The bracket projection 101 may be integral with the frame 74 or, as in the illustrated embodiment, may be a separate bracket Welded to the end 90. Blades 58, 60, positioned between upper blade contacts 54, 56 and lower blade contacts 62, 64 respectively, urge the blades upwardly against the upper brackets 54, 56 as a result of blade adjustment of brackets 66 and 68. Armature 84 is pivotally mounted on the coil assembly frame 74 by hinge pin 86, over which is spot welded a hinge pin retainer 126. Mounted on the body portion of armature 84 and on either side of hinge pin 86 are blade actuators 128 and 130, each consisting of a small wire 132, 134 welded to the bottom of the armature and a glass insulating head 136, 108 which contacts the blades. In the unenergized position, spring 102 urges the armature 84 to rotate in a clockwise position and glass head 108 urges blade 60 downwardly in contact with lower contact 64. Blade 58 is not depressed and accordingly it contacts upper blade contact 54 at the other end of the switch. Upon energization of the coils and actuation of the armature, the states are reversed and glass head 136 urges blade 58 downwardly in contact with lower blade contact 62, while glass head 108 moves upwardly with the counterclockwise rotation of the armature, permitting blade 60 to contact the upper blade contact 56. Openings 140, 142 and 144 in the base of the coil assembly frame 74 permit insertion therethrough of coil windings if desired although leads preferably extend through the end as shown in FIGURES 3 and 4. It is thus seen the rocking motion of armature 84, insuring an upper and lower blade contact at all times, operates as a double-throw, double-pole switch.

FIGURE 9 is an exploded assembly view showing the can 10, the coil assembly 146, the armature assembly 148 and the header and contact assembly 150, before final assembly, to show the interrelationship between the various parts. The header and contact assembly 150 includes the header plate 28 with the eight-contact pins extending therethrough and in insulated relationship. Lower blade contacts 62, 64 and upper blade contacts 54, 56 have been welded to pins 14, 20, 12 and 22, respectively. Jumpers 98 and 100 are connected to pins 18 and 26 to facilitate connection with the coil leads after their assembly. Blades 58 and 60 have been connected through blade brackets 66 and 68 to pins 24 and 16 and are insulated from header plate 28 by means of insulation 112. The armature assembly 148 consists of a crossbar 103 which is attracted to the core ends 94, 96 on energization and a body portion 110 extending on both sides of the pivot pin 86. Glass-beaded actuators 128 and 130 on either side of the pivot pin 86 are fastened to the underneath side. Suitable cutout portions are provided to prevent accidental contact or shorting across to other surfaces. Spring 102 fits into a recess at the end of armature 56. In the coil assembly 146, a piece of insulator material 154 is positioned over the top of coil assembly frame 74 and two coils 76 and 78 are positioned thereover. U-shaped core 92 is inserted through end 88 and the ends of core 94, 96 protrude through the other end 90 of the frame. These ends are then flattened for the purposes earlier mentioned. Insulator material 154 serves conveniently for holding the coil assembly while its legs 46, 48, 50 and 52 are spotwelded on the header plate 28. This material also protects the coils from sharp edges and forms a barrier between the coils and the can 10. Leads 156 and 158 from the coils are next welded to the jumpers 100 and 98 to complete the assembly, after which can 10 is inserted thereover and soldered. After assembly, vent hole 105 in the can is used to evacuate the inside. Air is pumped out, preferably at a high temperature, such as 120 C., and when a desired vacuum is achieved, dry nitrogen is released and drawn into the can as the vacuum is released. The vent hole is then sealed. In this manner, there is no moisture inside to cause corrosion. Also, nitrogen prevents dielectric breakdown and arcing, resulting in greater reliability with more closely spaced parts.

An optional modification (not shown) resides in the insertion of a diode in parallel with the coils for the purpose of cutting down the back electromotive force and the inductive load for the coil when the power has been turned off. With this diode, it is also possible to fabricate a bridge network so that the coil may be energized with an AC. voltage.

While the foregoing preferred embodiment is adapted to handle higher currents, such as a two-ampere variety, certain modifications shown in FIGURES 10 and 11 are made for dry circuit or low current operation, such as the one-ampere type. The end 60a of the blade and the upper and lower contacts 56a and 64a are of tubular material to provide point-to-point contact for extremely dry, that is, low current and voltage circuit operations. As an example, millivolts at 10 milliamperes might be the energy that is to be passed through these contacts. These contacts are of pure gold, because of its low resistance characteristic, and round, to prevent the foreign ma terial buildup. While this type of contact is very effective in the one-ampere region, they will not hold up under a two-ampere requirement because the two-ampere current would weld the contacts together. Pure gold also deteriorates under the higher amperage. No spring is used in this embodiment.

It is apparent from the foregoing description that the switch comprising the present invention has particular utility where small size is desired and which, because of its low mass, performs well in adverse environment conditions. Because of its symmetry in construction, the relay switch can be reversed in the circuit board without trouble, the only requirement being that if a diode is used, the coil extending to the contact pin embedded through the plate with a glass of a different color than the others must be connected to the positive side of the power supply. The dual coil configuration makes the coils small in size, but maintains the necessary ampere turns to hold the armature when energized. The armature actuation is vertical instead of the customary horizontal movement which permits smaller packaging, withstands shock and vibration better and is easier to adjust, as well as to initially fabricate.

Having thus described my invention and the preferred embodiments within which it may be utilized, it will become obvious to those skilled in the art that other improvements and modifications are foreseeable. It is therefore to be understood that these modifications and improvements are intended to be within the scope of my invention as defined by the following claims.

What is claimed is:

1. A relay switch comprising a header and contact assembly, a blade assembly, an armature assembly, a coil assembly, and a suitable housing, said header and contact assembly including a header plate, connector pins, said pins protruding through said header plate in insulated relationship therewith, one end of said pins protruding below said header plate for connection with external ci-rcuitry, the other end of said pins extending above said header plate serving as contacts for upper and lower blade contacts, contacts through which coils may be energized, and for connection of switching blades, coils connected to selected pins, said blade assembly including switching blades connected to selected pins, said ooil assembly including a frame having downwardly extending legs connected to said header plate and upwardly turned ends for positioning coils therebetween, coils positioned between said ends, a core inserted through said coils, the ends of said core magnetizing said armature upon energization of said coils, said armature assembly consisting of a crossbar for contact with said ends of said core, a body portion pivotally mounted on said frame, and insulated actuators on each side of the pivotal point of said body portion and mounted to the undersurface thereof for movement of said blades between upper and lower blade contacts upon energization of said coil.

2. A relay switch comprising a header and contact assembly, a blade assembly, an armature assembly, a coil assembly, and a suitable housing, said header and contact assembly including a header plate, glass insulating connector pins protruding through said header plate, the lower ends of said pins protruding below said header plate being adapted for connection with external circuitry, the upper ends of said pins extending above said header plate serving as upper and lower blade contacts, contacts through which the coils may be energized, and contacts for switching blades, said coil assembly including a frame having downwardly extending legs for mounting on said header plate and upwardly turned ends for positioning coils therebetween, coils positioned between said ends, said ends having holes therein, a core inserted through said holes, said blade assembly including switching blades connected to selected pins and extending to selectively engage said upper and lower contacts, said armature assembly consisting of a crossbar for contact with the ends of said core, a body portion pivotally mounted on said frame, and insulated actuators on each side of the pivot point of said body portion and mounted to the undersurface thereof for movement of said blades between upper and lower blade contacts upon actuation of said coil.

3 A relay switch comprising a header and contact assembly, a blade assembly, an armature assembly, a coil assembly, and a suitable housing, said header and contact assembly including a header plate, contact pins, said pins protruding through said header plate in insulated relationship therewith, the ends of said pins protruding below said header plate being for connection with external circuitry, the ends of said pins extending above said header plate being for switch connections, upper and lower blade contacts connected to the upper ends of selected ones of said pins, selected other pins having contacts through which coils may be energized, said blade assembly including switching blades connected to selected other of said pins, said coil assembly including a frame having downwardly extending legs mounted on said header plate and upwardly turned ends for positioning coils therebetween, coils positioned between said ends, a core adapted for insertion through said coils, the ends of said core magnetizing said armature upon energization of said coils, said armature assembly consisting of a crossbar for contact with the ends of said core, a body portion having pivotal means for mounting said body portion on said frame, and insulated actuators on each side of the pivotal point of said body portion and mounted to the undersurfaces thereof for movement of said blades between upper and lower blade contacts upon energization and de-energization of said coils.

4. A relay switch comprising a header and contact as sembly, a blade assembly, an armature assembly, a coil assembly, and a suitable housing, said header and contact assembly including a header plate, contact pins, said pins protruding through said header plate in insulated relationship therewith, the ends of said pins protruding below said header plate being for connection with external circuitry, the upper ends of said pins extending above said header plate, upper and lower blade contacts connected to selected ones of said upper ends, said blade assembly including blade brackets connected to selected ones of said upper ends, switching blades connected at one of their ends to said brackets, said brackets having tabs thereon for vertically adjusting the other ends of said blades, said coil assembly including a frame having downwardly extending legs mounted on said header plate and upwardly turned ends for positioning coils therebetween, coils positioned between said'ends and connected to selected pins, a core adapted for insertion through said coils, the ends of said core magnetizing said armature upon energization of said coils, said armature assembly consisting of a crossbar for contact with the ends of said core, a body portion pivotally mounted on said frame, and insulated actuators mounted on the undersurfaces thereof for movement of said blades between said upper and lower blade contacts upon actuation by said coil.

5. A relay switch comprising a header and contact assembly, a blade assembly, an armature assembly, a coil assembly, and a nitrogen filled hermetically sealed housing, said header and contact assembly including a header plate, contact pins, said pins protruding through said header plate in insulated and sealed relationship therewith, the ends of said pins protruding below said header plate being adapted for connection with external circuitry, the upper ends of said pins extending above said header plate selectively having upper and lower blade contacts, contacts through which coils may be energized, and means for connection of switching blades, said blade assembly including switching blades connected to selected pins, said coil assembly including a frame having downwardly extending legs mounted on said header plate and upwardly turned ends for positioning coils therebetween, coils positioned between said ends, a core inserted through said coils, the ends of said core magnetizing said armature upon energization of said coils,

said armature assembly consisting of a crossbar for contact with the ends of said core, a body portion pivotally mounted on said frame, and insulated actuators on each side of the mounting connection of said body portion with said frame, said actuator being extended from said body portion for movement of said blades between upper and lower blade contacts.

6. A relay switch comprising a header and contact assembly, a blade assembly, an armature assembly, a coil assembly, and a suitable housing,

said header and contact assembly. including a header plate, insulated connector pins protruding through said header plate, the lower ends of said pins protruding below said header plate being adapted for connection with external circuitry, the upper ends of said pins extending above said header plate serving as upper and lower blade contacts, contacts through which the coils may be energized, and contacts for switching blades,

said coil assembly including a frame with end portions supported within said housing, coils positioned between the end portions of said frame, said end portions having holes therein, a core inserted through said holes, said blade assembly including switching blades connected to selected pins and extending to selectively engage said upper and lower contacts,

said armature assembly consisting of a crossbar for contact with the ends of said core, a body portion pivotally mounted on said frame, and insulated actuators mounted to said body portion on each side of said body portions mounting on said frame for movement of said blades between upper and lower blade contacts upon actuation of said coil.

7. A relay switch comprising a header and contact assembly, a blade assembly, an armature assembly, a coil assembly, and a suitable housing, said header and contact assembly including a header plate, glass insulating connector pins protruding through said header plate, the lower ends of said pins protruding below said header plate being adapted for connection with external circuitry, the upper ends of said pins extending above said header plate serving as upper and lower blade contacts, contacts through which thecoils may be energized, and contacts for switching blades, said coil assembly including a frame having downwardly extending legs for mounting on said header plate and upwardly turned ends for positioning coils therebetween, coils positioned between said ends, said ends having holes therein, a core inserted through said holes, said blade assembly including switching blades connected to selected pins and extending to selectively engage said upper and lower contacts, said armature assembly consisting of a crossbar for contact with the ends of said core, a body portion pivotally mounted on said frame, and insulated actuators on each side of the pivot point of said body portion and mounted to the undersurface thereof for movement of said blades between 0 upper and lower blade contacts upon actuation of said said header plate being adapted for connection with external circuitry, the upper ends of said pins extending above said header plate serving as upper and lower blade contacts, contacts through which the coils may be energized, and contacts for switching blades,

said coil assembly including a frame with end portions supported within said housing, coils positioned between the end portions of said frame, said end portions having holes therein, a core inserted through said holes,

said blade assembly including switching blades connected to selected pins and extending to selectively engage said upper and lower contacts,

said armature assembly consisting of a crossbar for contact with the ends of said bore, a body portion pivotally mounted on said frame, and insulated actuators mounted to said body portion on each side of said body portions mounted on said frame for movement of said blades between upper and lower blade contacts upon actuation of said coil, said actuators having rounded surfaces at the point of actuation.

References Cited by the Examiner UNITED STATES PATENTS 2,464,591 3/ 1949 Larsen et a1. 200166 2,547,947 4/1951 Kleis et a1. 200166 Richert 200104 Talmey 200166 Dean 200104 Jordan 317197 Moenke 200104 Richert ZOO-93 BERNARD A. GILHEANY, Primary Examiner.

ROBERT K. SCHAEFER, B. DOBECK,

Assistant Examiners. 

1. A RELAY SWITCH COMPRISING A HEADER AND CONTACT ASSEMBLY, A BLADE ASSEMBLY, AN ARMATURE ASSEMBLY, A COIL ASSEMBLY, AND A SUITABLE HOUSING, SAID HEADER AND CONTACT ASSEMBLY INCLUDING A HEADER PLATE, CONNECTOR PINS, SAID PINS PROTRUDING THROUGH SAID HEADER PLATE IN INSULATED RELATIONSHIP THEREWITH, ONE END OF SAID PINS PROTRUDING BELOW SAID HEADER PLATE FOR CONNECTION WITH EXTERNAL CIRCUITRY, THE OTHER END OF SAID PINS EXTENDING ABOVE SAID HEADER PLATE SERVING AS CONTACTS FOR UPPER AND LOWER BLADE CONTACTS, CONTACTS THROUGH WHICH COILS MAY BE ENERGIZED, AND FOR CONNECTION OF SWITCHING BLADES, COILS CONNECTED TO SELECTED PINS, SAID BLADE ASSEMBLY INCLUDING SWITCHING BLADES CONNECTED TO SELECTED PINS, SAID COIL ASSEMBLY INCLUDING A FRAME HAVING DOWNWARDLY EXTENDING LEGS CONNECTED TO SAID HEADER PLATE AND UPWARDLY TURNED ENDS FOR POSITIONING COILS THEREBETWEEN, COILS POSITIONED BETWEEN SAID ENDS, A CORE INSERTED THROUGH SAID COILS, THE ENDS OF SAID CORE MAGNETIZING SAID ARMATURE UPON ENERGIZATION OF SAID COILS, SAID ARMATURE ASSEMBLY CONSISTING OF A CROSS- 